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MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+12K), DIYM227HP

Model: DIYM227HPW02D00More from MRCOOL
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$3,775.00
$3,775.00 $4,341.25
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Your system: 2 zones · 21,000 BTU

  1. Room 1 · 9K BTU151 to 350 sq ft
  2. Room 2 · 12K BTU351 to 500 sq ft
Line set length

Line sets for every room are included. Communication wire is sent to match.
Need different line set lengths? Choose here

Not the right size for your rooms? Build your own system →

In Stock · Delivers Nov 12-16 (Est.)
Free Curbside Shipping

MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+12K), DIYM227HP

$3,775.00
$3,775.00 $4,341.25

Free shipping
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What's included

Everything below is in the box for the set-up you chose above.

Outdoor unit

27K BTU Condenser
27,000 BTU outdoor unit One outdoor unit powers both rooms

Connects to every room

Indoor units (2)

  1. 9K BTU Room 1 · 151 to 350 sq ft
  2. 12K BTU Room 2 · 351 to 500 sq ft
  • 2 pre-charged line sets
  • 2 remotes with batteries
  • Wi-Fi + MRCOOL Comfort app

What size mini split do I need?

Takes about 10 seconds.

sq ft

We recommend

9,000BTU

6K9K12K18K24K36K
Shop MRCOOL DIY mini splits Or build your own system
See the BTU coverage guide
6,000 BTU100-150 sq ft
9,000 BTU151-350 sq ft
12,000 BTU351-500 sq ft
18,000 BTU501-750 sq ft
24,000 BTU751-1,000 sq ft
36,000 BTU1,001-1,500 sq ft

This is an estimate. Insulation, windows and the number of appliances in the room can change what you need. For assistance, contact our Product Experts.

System Details

DESCRIPTION

Take control of your comfort with the MRCOOL DIY 5th Gen Multi-Zone Mini Split System - the easiest and most affordable way to get powerful, energy-saving heating and cooling without hiring a pro.

  • Two Rooms, Perfect Comfort: Heat or cool two spaces that are 350 sq. ft. and 500 sq. ft. each with independent temperature control for personalized comfort.
  • Truly DIY-Friendly: Forget expensive installs - no HVAC license or special tools required. If you can use basic hand tools, you can do this.
  • No Hassle Setup: Comes with pre-charged Quick-Connect® line sets, so there’s no messy refrigerant handling or vacuuming. Just connect and enjoy.
  • Year-Round Savings: Boasting up to 23 SEER2 cooling efficiency and 9.5 HSPF2-4 heating performance, this system delivers serious energy savings.
  • Built for Every Season: Stay cozy even in the dead of winter - reliable heating works all the way down to -13°F.
  • Strong Warranty Protection: Includes 7-Year Compressor Replacement and 5-Year Parts Coverage.

Whether it’s hot summer days or freezing winter nights, the MRCOOL DIY Mini Split keeps your home comfortable and your energy bills low. Smart. Simple. Affordable.

SPECIFICATIONS & DIMENSIONS

  • SYSTEM OVERVIEW
  • System Type: Ductless Mini Split Air Conditioner & Heat Pump
  • Zones: 2
  • Capacity: Total: 21,000 BTU//Zone 1: 9,000 BTU//Zone 2: 12,000 BTU
  • Coverage Area: Total: 850 sq. ft.//Zone 1: 350 sq. ft.//Zone 2: 500 sq. ft.
  • Refrigerant: R-454B
  • Line Sets Included: 2 x Pre-Charged Line Sets
  • Warranty: 7 Years Compressor//5 Years Parts
  • OUTDOOR UNIT (27K) x 1
  • Model: DIY-MULTI4-27HP230D-O
  • Dimensions: 37.24" W x 16.14" D x 31.89" H
  • Cooling Capacity: 26,000 BTU
  • SEER2: 23.0
  • EER2: 12.0
  • Heating Capacity: 26,000 BTU
  • HSPF2-4: 9.5
  • HSPF2-5: 7.0
  • Outdoor Noise Level: 61.0 dB(A)
  • Outdoor Operating Temperature: Cooling: -13°F – 122°F//Heating: -13°F – 75°F
  • Voltage: 208–230V
  • Phase: 1
  • Cycle: 60Hz
  • Min Circuit Ampacity: 23.0A
  • Max Fuse Breaker: 25.0A
  • Weight: 140.2 lbs
  • Certifications: ENERGY STAR Certified//AHRI Certified//UL Listed//ETL Listed
  • INDOOR UNIT (9K) x 1
  • Model: DIY-09-HP-WMAH-230D25-O
  • Dimensions: 31.57" W x 7.44" D x 11.69" H
  • Mounting Type: Wall
  • Cooling Capacity: 9,000 BTU
  • Heating Capacity: 9,000 BTU
  • Coverage Area: 151 to 350 sq. ft.
  • Liquid Line Size: 1/4"
  • Suction Line Size: 3/8"
  • Modes: Auto Mode: Automatically selects heating or cooling based on the room's temperature.//Cool Mode: Lowers the room temperature to your desired setting.//Heat Mode: Raises the room temperature to your desired setting.//Fan-Only Mode: Circulates air without heating or cooling.//Dry Mode (Dehumidification): Reduces humidity levels in the room.//Sleep Mode: Gradually adjusts temperature settings for comfortable sleep and energy savings.
  • Weight: 24.47 lbs
  • INDOOR UNIT (12K) x 1
  • Model: DIY-12-HP-WMAH-230D25-O
  • Dimensions: 31.57" W x 7.44" D x 11.69" H
  • Mounting Type: Wall
  • Cooling Capacity: 12,000 BTU
  • Heating Capacity: 12,000 BTU
  • Coverage Area: 351 to 500 sq. ft.
  • Liquid Line Size: 1/4"
  • Suction Line Size: 3/8"
  • Modes: Auto Mode: Automatically selects heating or cooling based on the room's temperature.//Cool Mode: Lowers the room temperature to your desired setting.//Heat Mode: Raises the room temperature to your desired setting.//Fan-Only Mode: Circulates air without heating or cooling.//Dry Mode (Dehumidification): Reduces humidity levels in the room.//Sleep Mode: Gradually adjusts temperature settings for comfortable sleep and energy savings.
  • Weight: 24.47 lbs

INSTALLATION & GUIDES

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Installation Manual PDF
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5th Gen Brochure PDF
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Energy Guide PDF
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AHRI Certificate PDF
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Remote Control Manual PDF
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Warranty PDF

SHIPPING POLICY

Free Curbside Delivery
MRCOOL orders include free curbside delivery via FedEx Ground, FedEx Freight, or the most trusted carrier available. Please note that delivery is to the curbside only - be sure to arrange for assistance if needed, as the carrier will not bring items inside your home.

Tracking & Delivery Scheduling
In most cases, you will receive tracking details 3-5 business days after you place your order. When the tracking number is sent, please allow 1-2 business days for the tracking number to populate details.

See our full Shipping Policy here.

RETURN POLICY

MRCOOL returns must be requested within 30 days of your delivery date. We are unable to process returns submitted after this period. Products must be unused, uninstalled, and in their original packaging, including the box and pallet, to qualify for a return.

Restocking Fee
Please note, a 35% restocking fee will be applied to all approved returns.

Non-Returnable Items
Accessories including lineguards, wall mounts, linesets, couplers, and similar items are not eligible for return.

See our full Return Policy here.

DIY install

Yes, you can install it yourself

5 of 6 steps are DIY. Just leave the wiring to a qualified electrician.

You will need:Hammer drill and core drillWrenches and screwdriverGloves, goggles and maskVinyl tape
  1. 1
    Mount the plate and drillFix the plate level, then drill a 3½ in hole sloping slightly down to the outside.
    DIY
  2. 2
    Hang the indoor unitFeed the lines through, hook the top, push the bottom until it clicks.
    DIY
  3. 3
    Set the outdoor unitBolt it to a level pad or wall bracket with room around it.
    DIY
  4. 4
    Connect the line setQuick Connect fittings: match the labels, hand-tighten, then snug with wrenches.
    DIY
  5. 5
    Wire it upMatch each wire's number and colour. Must be done by a qualified electrician.
    Electrician
  6. 6
    Open, check, testOpen the valves, check every joint for bubbles, then power on.
    DIY

Always follow the full installation manual (PDF) and your local codes.

About MRCOOL

Industry's Only DIY Mini Split Ductless System!

Upgrade your home’s heating and cooling with the MRCOOL DIY Mini Split, designed for hassle-free installation and superior energy efficiency. With its innovative patented pre-charged line sets, you can enjoy year-round comfort without the need for professional help. Ideal for homeowners, the MRCOOL DIY series offers customizable climate control with a high SEER rating, ensuring you save on energy bills while maintaining optimal comfort. Key features include a variable-speed inverter compressor, wireless control through smart devices, and compatibility with Amazon Alexa and Google Assistant for seamless home automation. Available in various sizes, this system provides reliable and quiet operation, perfect for bedrooms, living rooms, or any space in your home. Backed by an industry-leading warranty, the MRCOOL DIY Mini Split is the perfect solution for homeowners seeking powerful performance, ease of use, and long-term savings.

See more about MRCOOL